NASA Planetary Defense Assessing Ion Beam Strategy

Dimorphos-5

NASA’s Double Asteroid Redirection Test mission struck the 160-m moonlet asteroid Dimorphos (shown) in September 2022, changing its orbital period but generating a trail of debris called a surface disruption.

Credit: NASA
HOUSTON—As NASA’s planetary defense strategy for detecting, tracking and diverting Near Earth Objects on trajectories to impact the Earth evolves, there is a case for an Ion Beam Deflection (IBD) mission to demonstrate a new low-thrust concept that could counter the “rubble pile” nature of certain...

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